package test;
import java.rmi.MarshalledObject;
import java.util.*;
public class YootkDemo15 {
    public static void main(String[] args) throws Exception{
        Map<Integer,String> map = new HashMap<>();
        System.out.println(map.put(1,"yootk.com"));
        System.out.println(map.put(1,"www.yootk.com"));
        System.out.println(map.put(1,"yootk"));
        System.out.println("【Map数据】"+map);
    }
}
